Telegraph system



- Oct. 17, 1944. E. REISZ TELEGRAPH SYSTEM Filed Dec. 18, 1942 2 Sheets-Sheet l EUGEN Rslsz.

Oct. 17, 1944. E. REISZ 2,360,719

TELEGRAPH SYSTEM Filed Dec. 18, 1942 2 Sheets-Sheet 2 lie EUGEN REISZ INVENTDR Patented Oct. 17, 1944 TELEeR-Arn sYs'rEM Eugen n eisaii'wyorknwr; Application December 18, 1942, Serial No. 469,397

- 2 maesupon they are transmitted at'high speed from said sound re'cordingsurface to a, second sound recording surface arranged in a, receiving station, the record" thus obtained in said station being then reconverted into telegraphic impulses,

' The present inventidnbohsistsinthe improved method and means which are employed for mak ing the sound record and for reco'nverting said sound record intoimpulses operating a telegraphic printer. v I

In particular the invention consists in a telegraphic system in which the soundfrecording surface "simultaneously receives 'a plurality of separate and sound producing records for each character to-be'transmitted, the said'simultaneously producedrecords'beihg placed oh'one and the same sound trackso 'that they are successively operative-when a souiid'producirig device such'as astylus runs over the track. The electrical impulses thus produce'd'by the sound track are transmitted to the receiving station, in conforniity withthe system'above'described; and are converted againinto a sound record which is used to generateelectric impulses. Among the impulses'thusge'nerated those which have been produced simultaneously in the transmitter station' and whichtherefore belong to one character are now made operative on the character selecting and printing 'mechanismsof the printing ar- 4 The invention further consists in m'eans'arranged in therceiving station for difie'rentiating between impulses corresponding" tosimultaneously made records and impulses correspondingto successively made reco'rds. This differentiation'is obtained by maintaining a; predetermined spaced relationship -between the impulse 'recordsfthe records of the first impulses belonging to difierent characters being,- for' in- Ill:

sound recording surface used for recording impulses in the transmitter with a sound track without using a conversion of the telegraphic impulses into sound waves actuating a diaphragm coupled with a needle or into electrical oscillations producing an acoustic record by means of a cutter. Instead of such a transformation direct action of a type-bar associated with a character is made useof=-which produces a direct impression on the surface or so influences the latter that it will produce an audible sound or an oscillation of audio frequency in cooperation with suitablemean's such as an electric pick-up.

-- The invention 'further consists in adapting the well known systems,.wherein a number of group signals are sent in succession for. each. character tobe printed, for the present. purposes, by. pro-:

ducing the group signals. for 'one character simultaneously while sending them through. the line in succession; These simultaneously 'produced but successively transmitted groups of impulses, which are-associatedwith one character, are'T'then. made operative in a different way in the receiving apparatus or in the translating arrangement of. the receiven so that they.;cooperate to select the desired .character. 1

Further objects of-the invention will be described in the following specification.

'The'invention is illustrated in the accompanying drawings by. way. 01f example These drawings' show .one modification of the system, which 1 embodies the principlethat has been adopted and several modificationsof the apparatus and stance, arranged at much greater distances than the records "of the first fimpulse's 'of impulse groups belonging'tc the same"' character.' In the sound 'rec'ordbf' the receiving station the m5,

pulse" groups 'willbe "spaced proportionally; A -distributor'coupled with 'sa'idso'und record and moving at aspeed exactlyi'proportional to that of said record is thusable' to send iinpulsegiroups belonging'to one character to the character selection devices of the printer and to return all 7 selective devices to their :original position in 1 time before thefsouird record 1 has covered j the distance corresponding to thatof i'mpu'lQse groups belonging to successive'characters.

The'inventioniurt "erlc'onsiists providing the arrangements which maybe used within said system;

Fig. l ofthe drawings illustrates in a purely diagrammatic way the main; features of .the

Fig. 2 shows -a modification of the translating arrangement of the transmitter,

Fig. 3' shows the enlarged head of a type vbar with the type slugs and illustrates the production of signal groups for each character, yFig. 4;shows a modification of the typewriter used at the transmitting end; with two endless tapes receiving the record of the messagetobe sentover the line; one tape'receiving the'printed record, while'theotherreceives impresed corrugations to'be utilised 'fo'rp'signal producing purposes, i I V Fig. 5 illustrates diagrammatically the use oi another typewriter inwhich a discisI'provi-ded with thecorrugations or inde t t to beutif lised for'sign'al producing p s tions may be performed .either directly by producing the undulating surface in a mechanical Way or indirectly by using an electrical or 'elec tro-optical device for the production. of the record. Alternatively a sound record may be made by printing lines of variabletransparency Which are then used to produce a sound record in the manner well known from the production of such records from cinematographic films.

The second part of the translation consists in character (letter, numeral, stop, conventional producing a sound, preferably a tone, by means of the record in any approved phonographic apparatus. This sound or tone is then transmitted over the telephone lines to a receiving station, either in the same way in. which speech is transmitted through the diaphragms of the microphones and telephones or by transmitting the electrical current oscillations engendered in the circuit of an electric pick-up, cooperating with the sound record, over the telephone lines. The sound vibrations or currents thus produced and transmitted arethen recorded at the receiving station on a gramophone disc.

The record thus made at the receiving end is now retranslated into electrical current oscillations utilized to operate a telegraphic receiving apparatus. The translating means employed contain identification or distribution members for distributing the groups of. signals in such a way that they act on the selecting members operating the type wheels or bars in the prescribed fashion.

The telegraphic 'system therefore essentially consists in atranslation system A (Fig. 1) in the transmitter B translating printed signals or impressed signals into-a sound record C, in a sound producer D and in a transmission line T, preferably a telephone line,for transmitting the sound oscillations inscribed on the record to a receiver R, in a sound recording mechanism E in the receiving station and in a translating apparatus F for translating the sounds inscribed on the record of the receiving station into impulses operating a printer or a typewriter P.

As will be clear from the above description the system is capable of high speed transmission over telephone lines. Moreover, as solely sounds are transmitted, the telephone equipment can abbreviation), while the other contains a suitable matrix' which will produce a certain number of sinusoidal corrugations, as described later in detail. Both slugs strike simultaneously so that two impressions are produced on the tape 2 when a type bar is operated The printed record produced by impression of the characters is, of course, not necessary for transmission purposes, but serves 'as a permanent record to be retained in the transmitting station. i i

It is of advantage to use two (ormore) signal groups for each character, each group, as shall be described later. in connection with the translating apparatusof the receiving station, actuating different members capable of selecting the proper character ona type wheel or cylinder. As shown in Fig. 3 two juxtaposed groups of corrugations l and Baretherefore arranged on a type slug corresponding to one character. Each group contains a definite number of corrugations 9, 5 and 6 corrugations respectively being shown in the figure. This number is however arbitrarily. selected for the sake of clear representation.

transmitted through a microphone or telephone i,

tween the signals "for telegraphic purposes and The corrugations 9 are of sinusoidal shape in cross section, as indicated, and they constitute a matrix pressing against the tape 2 when a type bar is operated. v

The slug containing the corrugations may be wider than slug 4 as the space between two adjacent group of corrugations may be much smaller than that left between two characters. The impression is made on the surface of the tape where a suitable material is available for this purpose; alternatively a prepared surface coating covering part of the tape surface may be used. The. tape which has been corrugated by the impressions maybe directly used as a record actuating a talking machine, if necessary after having undergone a stiffening or hardening process.

In some cases it may be of advantage to dispense with the impression of corrugations and to make printed impressions, In this case the group signals consist of black or shaded and white lines printed .in, the usual way. This method admits correctionof the record in the same way in which such correction is made in a typewritten script.

The tape or thatpart of the tape on which the lines have to be printed is preferably transparent or translucent. A sound record is produced from it in the same way in which a sound record is produced from cinematographic sound tracks on a motion picture film. The method is diagrammatically illustrated inFig. 2.

The tape is stretched betweentwo spools l0 and II and is advanced atja slow but regular speed. It passes between a source of light I! and a photo-electric cell I3. Thelight falling from the source of light to the cell 13 isintercepted by the black or, shaded lines and electrical pulsationsare setup in the circuit M of ,the cell which are actuating a cutter I5 making a sound track in a gramophone disc IS. The

approximately 3000 words per minute.

sound track record made on the disc thus comprises a number of oscillations equal to'the number of black or shaded lines printed on'the tape.

According to a further modification shown in Fig. 4 two tapes one above the other, 2 and 2 respectively, moved by independent feeding rollers I8, and 20, respectively may receive the impressions. The top most tape 2' is corrugated while the second'tape 2 receives the letterpress impression; The arrangment of separate tapes for the two kinds of impression is of advantage in many cases as the surfaces which are best suited for printing letterpress characters by means of a ribbon are different from those required for receiving and preserving a perma-' nent corrugation. Different materials may be used in this case for the two tapes. Moreover the speed with which the tape travels or the distance for which it is shifted at each depression of a key may be better adjusted for the purpose in view.

In Fig. a modification is shown, wherein the typewriter used in the translating arrangement of the transmitting station is modified so as to be able to make direct impressions on a 1 disc. Said disc I6 is mounted on an axle'which is slowly rotated and at the same time is moved towards the printing point. The mechanism which is used for rotating the axle 23 and for shifting the frame 24 in which it is journalled is practically identical with the well known arrang'ements for advancing the tape feeding rollers or for effecting the carriage advance in tickers or typewriters and is indicated merely in a diagrammatic way at I23'and I24. This mechanism advances each point of the disc I6 along a spiral. The corrugations are thus placed in spiral grooves and the disc I6 may be'used directly in a talking machine to produce a sound or tone.

After having made the sound record either on a tape 2 or on a disc I6 in one of the ways above described at slow speed the tap 2 or disc I6 is placed in position in a talking machine 25. The speed with which the disc or tape is moved is however-much lighter than that with which the sound record has been produced. It corresponds to the frequency of the highest tone that may be transmitted through'a microphone or telephone or sent over telephone lines and which is consistent with a perfect sound reproduction at the receiving end. e I

Assuming, for instance, that 360 characters (60 words) can be printed per minute, each character together with the blank space between adjacent characters occupying about in. then the total length of tape printed in one minute will be equal to 90 in. or to 5% ft. .The speed with which a stylus can run over a sound track, reproducing perfectly the tone or sound that has been recorded may be assumed to be about 3 ft./sec. The speed of transmission in this case can therefore be about 48 times that of'printing the message. Assuming further. that one corrugation in the example above givenwill occupy .01 in. the frequency of the tone thus produced will be merely 3600 osc./sec., a frequency which is far below the limit of approximately 10,000 osc../sec. that can be negotiated. The

number of characters transmitted per minute in this case over the line is 17,500 per minute or This speed exceeds the highest transmission speed "obtained by multiplex systemsand byso called .machine telegraphs using perforated tapes. No

- mission is sodesigned that the disc 26lwillrmove such'speed was'obtainable hithertoin the case of telegraphy over telephonelines, where-.Jthe slowing down of the signal ,current variations reduces" the transmission speed to a merefraction of the above mentioned value.

The above indicated speed isby no meanszthe speed limit. The type slug usually occupiesrfar less' than an in. with knownteletypewriters so that a notablereduction of the width of the impression'below the rather large value above' mentionedis possible. This is not only of advantage as regards the speed obtainable but also with respect to the frequency of the tone sel cted, which'shouldbe very high as above explained. When selected above 7500 osc./sec.-it will-be inaudible to most persons and in any case it will be entirely dissociated from sounds produced by the human voice. 1 I 1 The transmission of the message is completed when the sound waves transmitted over the line have been recorded on a disc 26 in the receiving station R. The record is then inserted at'the proper place inthe arrangement Etranslating the sound trackrecord into impulses operating a printing arrangement. Y e Translation arrangement E consists of an impulse generator 5I-,-of a distributor-G and of a printing mechanism P. The impulseg enerator comprises the rotating gramophone-table 1,6 driven by a motorby means of ashaft- 64 and a transmission gear 52, 53, 5-4, this trans at low'speed withrespect-to the stylusor needle of the electric pick-up 5I, a speed which will per mit the printing of about 360 characters :per

minute.- Th arrangement may be designed forv a somewhat higher or for a lower speed without I much change. y

The motor shaft 64 also drives shaft 6I by means of a gearing 56, 51, 58, I the two transmissions is so selected thatshaft 6I performs one revolution when disc 26 is advanced for a distance corresponding to-o ne character. a

Shaft 6| drives shaft 62 of the distributor .G

by means of a friction be1t:-or-cable .63.; .-The

belt may constitute a frictional coupling between the two shafts and for this purpose it may be adjusted in such a way that gliding of the belt can take place when shaft 62 1s arrested, while there is sufficient friction to-drive the shaft when it is free to move. Instead ofthis arrangement which has been shown for the sakeof simplicity a friction coupling (not shownlmay be provided,

consisting of friction discs, one of ,whichis f xed on shaft 62 while the other is loosely mounted thereon and carries the pulley 21 for .belt 63.

The distributor G comprises moreover a disc 48 carrying an approximately semicircular contact segment 41 which covers an are. somewhat smaller than This segment is connected with a collector ring 49 with which the contact brush 44 is in permanent contact. Two further brushes 45 and '46 cooperatewith contactsegment 41. As will be gathered from the drawings they are placed on opposite sides of disc 48 so that only one of the brushes may be'in contact with the segment 41 at a. time. Their osition is moreover such that when contact segment 41 leavesv one of the two brushes during rotation of shaft 62 it will engage the other brush'j only after a short interval of time.

Disc 48 is moreover provided with an outwardly projecting stop 43 which may be heldbyv the hooked end of a finger 4I fixed on the armature 59. The ratio of the circuit of the printing magnet 11. The springs are closed when the stop passeseover them. They are arranged close to the position ofrest of the disc but ahead of this position so that the stop will engage the springs shortly before reachingits position of rest where it is held by the hooked end 49 of finger 4|.

' The printing arrangement P consists of a type wheel or type cylinder 9| which comprisesa number of discs, rows or levels. In the example shown 6discs, rows or levels are arranged and each disc or row carries 6 types on its circumference. The type cylinder is mounted on a type shaft 92 and may be shifted and rotated with it. This shaft is held in suitable bearings (not shown) permitting axial and rotational movement of thesame.

Shaft 92 is provided with a, lower extension 93 forming a square shaft. It is under the tension' of a clockwork spring 68 which attempts to return it to its original position whenever the shaft 92 is rotated. A spring 69 returns said shaft when it is moved axially.

Belowthe printing cylinder 9| a sleeve 94 is arranged which is secured to shaft 92 in such a way that axial displacement is transmitted while both parts are free to rotate within each other. To secure axial connection between the parts set screws 84 may be provided which enter circular grooves 89 provided in shaft 92. The sleeve carries two racks 8! and 88, the former cooperating with a spring pawl 96 of vertical or disc shifting magnet 99 while the latter is engaged by a detent 13 carried by the arm I of release magnet 12. Magnet 99 is provided with an armature 98 fixed to an arm 95 which is pivoted at 82. Spring pawl 96 is pivotally connected with said arm and is held at one end by a spring I02 which is without tension when the arm '95 is in its position of rest. The spring I02 holds pawl is thus tilted towards the rack. It will therefore engage the teeth of the rack shortly after the starting of the upward movement, and it will advance the rack for one toothduring the movement imparted to the arm 95 by one onergization of the magnet 99.

Advancing the rack for one tooth will bring the topmost disc or row of the type wheel or cylinder 9| into the printing position H indicated in dotted lines. If the magnet is energized repeatedly by a number of impulses each energization will advance the rack for one tooth and it depends on the number of impulses whichdisc or row of the type wheel 9| will ultimately have reached the .position H.

When, upon de-energization of magnet 99 arm 95 and pawl 96 fall back the typecylinder 9| on shaft 92 and sleeve 94 are held in the position to which they have been brought by the pawl, by means of detent I3 engaging rack 88.

carrying the detent 13.

This detent is held in its place bya spring I04 acting Rota -tion of shaft 92 and of type cylinder 9| is performed by means of the square shaft 93 which engages a ratchet wheel 86. It will be understood that shaft 93 may be moved in axial direction without impairing the rotational engagement I between the square shaft and the square bore in the hub of the ratchet wheel which is held in its position Without moving with the shaft by washers I95 and suitable parts of the frame 196. The ratchet wheel, moreover, is engaged by a pawl 8 5.pivotally mounted on the arm 83 fixed to armature I5 of rotary magnet 80. The construction and. arrangement of pawl is identical with that of pawl 96 operated by the vertical magnet 99. When the rotary magnet is energized the pawl is rapidly moved into engagement with the ratchet wheel 86 and advance-sit for one step (which in this case is of the circumference) while the pawl 85, when in its position of rest, keeps clear of the teeth of the ratchet wheel and permits free movement of the same. v

To hold the ratchet wheel 86 in the position to which it is advanced by pawl 85 against the tension of the clockwork spring which tends to return it to its original position, a detent I9! is arranged on the arm 19 of release magnet 12. The printing arrangement moreover comprises a printing hammer-39 which has the form of a bell crank lever andis pivoted at 14. One part of the hammer; is arranged opposite the printing position of type wheel or cylinder 9| and this part carries the striking block 32, striking from behind against the tape after the selected type of type cylinder 9| has been moved to the printing position H, and thus causing an impression to be made on the tape. The second part 3 of the printing lever 39 carries a roller 65 acting as a follower and cooperating with cam 69 on shaft 6|. This portion is moreover urged upwardly by a strong spring I98 attached to it. Its end. is provided with a projecting nose it!) which may be engaged by the hooked end 19 of an extension IIO mounted on armature lever I8 of printing magnet TI. The armature lever I8 car- .ries a second arm 36 which controls the contact nose N39 is disengaged from the hooked end of extension H0 and the printing hammer will be urged to strike toward the printing position.

The. tape 35 on which impressions have to be made is stretched between rollers 33 arranged on bothsides of the printing position. These rollers are advanced for one step at each stroke of the printing hammer 39 by a mechanism, which is not shown in the figure. It comprises a ratchet wheel mounted on the axle carrying roller 33 and a pawl driven .by shaft 74 of the printing hammer 30.

Between the rollers 33 which are located close to the printing position a bridge piece 3| supporting and'guiding the tape may be arranged. The bridge piece is provided with a cut through which printing block 32 strikes the tape during the forward movement of the hammer 39. The

rollers from which the tape is unwound and on outside as usual.

'whichitiislwoun'd in the course of the printing are indicated at.8|. v

The tape may be covered'with carbon paper to produce printed impressions. Preferably however .an inking mechanism; consisting of an inking roller anda" distribution roller in arranged beneath the printing. pointH. v The tape feeding mechanism and the inking mechanism are completely identical with the mechanisms as used in the prior art and no detailed description and illustration appears to be necessary:

The operation ofthe translating mechanism;

is the following:

The-driving motor 50 is connected with the mains |00, WI and is. started. Itrotates at a constant and predetermined speed. Shafts 90 and 6| are both driven from shaft 64 and are;

therefore maintained at aconstant speed relation with respect to each other. When operation starts .all parts are in the position shown in the drawings.

Shaft 90 and gramophone table 91 are rotated at a speed which approximately corresponds to the speed of 360 characters per minute. This speed is therefore a-fraction only of the speed ;with which the sound record was made. A series ofimpulses succeeding each other at relatively ;-slow speed is generated in; the pick-up their number corresponding exactly to the number of corrugations which were produced in'the transmitting station .3 duringthe recording ofthe message. These'electrical impulses which may. -be amplified orrelayed before being sent into the translating mechanism, as indicated at IH, pass through line H2, start magnet 39, line H3,

vertical magnet 99, line H4, brush 46, segment .41, collector 49, brush 44, and return by means of line H5. 'Disc 148 and segment 41 are held in .their position 'of, 3 rest when operation starts.

With the first impulse the start magnet 39 and .the vertical magnet 99 are energized simultaneously and the formerwill, move finger 4| out of engagement with stop 43." Belt 63 will therefore be able to-drive shaft 62 which is no longer arrested and disc 48 willtherefore begin to rotate, in

the directionof the arrow. Segment 41 will rotate with the, disc, but contact between it and brush 46 is maintained. during a half revolution ofthe shaft approximately. During this interval the impulses generated in the pick-up 5| are transmitted to the vertical magnet.

. It has been assumed for ,the sake of simplicity that the number ,of'i'mpulses delivered to the vertical magnet is equal 'to the number of steps throughwhich the .printing cylinder. has to be advanced. When the .vertical magnet receives these impulses, 5 impulses for example, it will upon :each 'energization, actuate armature'98, which will fall back upon. each deenergization. Arm 95 and pawl 96 will therefore be moved upwardly. Each movement of pawl 96 will advance I rack 81 for one tooth, as already explained. The

rack together with sleeve 94to which the rack is fixed is held during the intervals of deenergization of the magnet 99 by detent 13 engaging the second rack 88. The sleeve is thus raised for 5 steps and with it the printing cylinder 9| is lifted and the 5th disc or row of the cylinder is brought to theprinting position H.

During the delivery of the printing impulses start magnet 39 was energized, too, but after the first impulse this energization was without-"- able distance from each other.

the rotary magnet 80 which will contact springs 31 and 38. of the release magnet 12 will be closed. This cireffect. "Contact segment 41 has been rotated during this interval to such an extent that at the end of the interval it will' leave contact brush 46. After a short pause during which it is not in contact with a brush, it then engages contact brush 45. Itwill be remembered that two groups of impressions were made, arranged at a suit- 41 engages brush 45 the second group of impulses becomes operative. The rotary magnet is now connected with lines H2 and H5 over lines, I I6,

magnet winding 80, line H1, brush 45, segment 41, now in contact with this brush, collector 49, brush 44. The impulses will therefore energize move armature 15, and arm 83 with pawl 85. The pawl will advance the ratchet wheel 86 for a number of steps corresponding to the number of impulses received. The ratchet wheel 86 in its turn rotates square shaft 93 and with it the type cylinder 9|. Thereby the special character in the selected level or row of the type cylinder 9| will be brought into its operative position facing the tape 35.

, The ratchet wheel 86 is held between the impulses by detent 1| on lever 10 which is solidary with the armature of release magnet 12.

It has been explained that the timing of the rotational speeds of shafts 5|, 6| and 62 is such lution cam 60 has presseddown lever arm 34 of theprinting hammer 30 by means-of follower- 65. 0 Spring I08 has thereby been tensioned and nose I09 was moved into engagement with hook 19, which holds the printing hammer in this posifrom the follower 65' during the second half of the revolution tion, while the vcam moves away of shaft 6|. Shortly before completion of the revolution of shafts 62 and 6| stop 43 on disc 48 strikes contact spring 66 and establishes-contact between this spring and spring 61. An energizing circuit for the printing magnet 11 is thereby closed which runs from main line I00 'over connection H8, contact'springs 66, 61, connection H9, magnet 11, and connection I20 to main line |0|. Printing magnet 11 is energized andiits armature will disengage the hooked end 19 on finger H0 from nose I09. The printing hammer 30 is thereby released and spring I08 will thrust the hammer towards'the tape 35. Striking block 32 will strike the tape with great force .and causes an impression of the character on the typexcylinder, facing the. tape, to be made. As has been described the movement of the hammer 30 and of the axle 14 advances the tape for one step, so that it is ready for .the next'impression. When the printing magnet is energized its armature 18 will rock extension 36 which closes the Thereby the circuit cuit branches off from connection H8 and includes connections I22 and IN, release magnet 12 and the contact springs 31 and 38. Release magnet 12 is thereby energized and its armature 1| moves arm 10 to the left against the tension of spring I03 thereby releasing simultaneously rack 88'and ratchet wheel 86, as detents 13 and I01 are disengaged from these members. If necessary'armature'1|"may'be weighted so as to move at a slower speed than printing hammer 30.

When segment When rack 88 and ratchet wheel has been released springs 68 and '69 will immediately return the shafts 92,93 and type cylinder to their original position. These members are now ready for being set for the next impression. Printing hammer 3!] is returned, as -described,- duringthe first part of the next revolution 'of shaft GI.

At least one impulse has to be delivered to start operation and this impulse, in'the example illustrated, is a vertical impulse. Should no impulse be delivered to the rotary magnet 80 the operation is exacth .the same. In' this case the first character in the row that has been lifted to the printing position is printed. During pauses in which no impulses are delivered'theprinting hammer is held by the hooked end 19 and the cam rotates without 'moving the'follower 65.

It will be clear from the above description that shortintervalsbetween the signal groups are of advantage, as they will exclude the possibility of confusion between signal groups. There is sufiicient time in such a case for the releasing and returning of the type cylinder. A 'misadjust- -ment of one of the shafts, discs, cams or the like causes a permanent error in the'r'eproduction of the message which is'therefore detected immediately by the observer. Therefore the system is self correcting in the same way in which systems transmitting the difference between successive impulses are self-correcting.

The details of the transmitting, translating and printing arrangements may be modified without departing fromthe invention.

Other systems of telegraphy maybe adapted'in analogous manner for the purpose set forth. The

principle governing this adaptation consists in delivering a number of impulses for each character to be typed which are capable of being translated into an equal number of surface undulations and to arrange the separately formed series of impulses belonging toone groupinto a continuous series in which they are so located that they can be identified thereafter. The surface is then ready to act as a ton producing record at high speed.

By using the above stated principle anumber of well known telegraph systems maybe so modified that they will admit transmission over the lines in the form of high pitched :sound oscillations according to this invention. I

The system according to the invention has many special advantages besides those mentioned in the foregoing specification. It admits correction of errors made in typing the message before transmission or translation. Where the characters and the signals are both printed correction does not differ from that -of atypewritten' script. In

other cases the faulty part of the tape may-be cut out and a corrected part may-be inserted before using the tape for transmission purposes. The record made in the receiving station may be driven with constant speed and no difliculty will arise on account of the decrease of circumferential speed at different points of the spiral, as the same record is used which has been received and as neither frequency nor number of impulses is affected.

I claim:

1. In a telegraphic system in which telegraphic impulses are recordedon a recording surface at low speed in a transmitting station, are then transmitted over a line fromsaid recording surfaceat high speed to a receiving station, and are again recorded in said station on a second recording surface, the impulses thusrecorded bein such positions that these impulse records are successively operative when a sound producing device runs over the sound track of the said surface, these records being reproduced'on the sec- 0nd recording surface in the receiver station in accordance with the above mentioned system, in reconverting the second record into electrical impulses and in making the impulse records associated with one character operative on different mechanisms of the printing arrangement.

2. In a transmitting station ofla printing telegraph, a translator arrangement, comprising members associated with the characters, each provided with means for making a plurality of separate impressions simultaneously on a recording surface, means for converting said impressions into sound oscillations and said sound oscillations into electrical oscillations of audio frequency, said means including a sound recording surface with a soundtrack consisting of record portions derived from the impressions made by the aforesaid members, with the'records corresponding to simultaneously made sound tracks arranged in suc'ccession and the records made by different members also arranged in succession, but at diiferen't distances from each other, on the sound tracks of the recording surface, an oscillation generator, whose operative member is the aforesaid sound recording surface, driven at a speed which is amultiple of the speed at which the record was made, and means for translating the. sound record into electrical oscillations. r

'3. In aprinting telegraph system a transmitting statio'n containing a translation arrangement with members'associated with the characters to be selected, each member being provided with means'for making simultaneously a plurality of separate impressions, means comprising a sound recording surface with an operative sound track produced by the impression means, simultaneously made impressions being located on successivelyoperative portions of the sound track, a line and a receiving station, a recorder containing a further sound recording surface in said receiving station, a translation and printing arrangement, the former comprising an :sound track.

impulse generator formed by an electric pick-up in operative connection with the aforementioned sound recording surface and a distributor in positive speed relation "with said surface, the latter containing a plurality of control units, operated by different impulse series for selecting the character to be printed, said distributor by virtue of the speed connection with the impulse generating recording surface distributing successive impulses, whichwere derived'from simultaneously made impressions *in the transmitting staducing a sound record, said means consisting 'in impression making members with matrices making direct impressions on the sound recordmg surface in the form of corrugations capable of producing sounds when forming part of the 5. A transmitting arrangement of a printing telegraph according to claim 4, with a translating arrangement wherein .sion making members is provided with a matrix into which a plurality of groups of sinusoidal undulations are cut, said'groups being arranged side by side at a predetermined distance from each other, the number of undulations in different groups difiering from each other for different characters, the member carrying said matrix being adapted to make a direct impression on the sound recording surface with the various groups of impressions located in one sound track, one behind the other at the above mentioned predetermined distance- 6. In the transmitting station of a printing telegraph system according to claim 2, a trans lation arrangement, wherein the impression members are provided with types, printing a number of units for each character, and wherein a recording surface is provided, on which an intermediate record consisting of the printed impressions from the above mentioned types can be printed, the said translation arrangement further comprising a photo-electric arrangement with a photo-cell and a source of light, between which the printed record is scanned and in which electrical impulses are produced, corresponding to the number of dark units, printed on the record and further comprising an electric cutter, cooperating with the sound recording surface of the translating device, operated by the impulses generated in the photo-electric arrangement and cutting sinusoidal grooves into said surface exactly corresponding to the -number of units printed on the intermediate record.

7. In a printing telegraph system according to claim 3, a translation arrangement in which groups of impressions are made on a record, the impressions made simultaneously being arranged at one predetermined distance from each other,

and in which means are provided for advancing the said record over another predetermined distance after the making of an impression, so as to align successively made impressions on said record, a receiving arrangement comprising sound recording means for making a record, corresponding exactly to the record made in the transmitter, a translating arrangement with an' impulse generator operated by the record made in the receiver, with driving means for said record and with a rotating distributor coupled during'rotation with the driving means of the impulse generator, contact members in said distributor, adapted to establish various connections duringits rotation, a printing device with a type carrier, means for selecting a type on said car rier and for moving the selected type intoan operative position, said means being operated by a plurality of independent, electromagnetically controlled selector mechanisms, each mechanism provided with an energizingcircuit and operated by a series of impulses, the said distributor, after a predetermined advance of the record corresponding to the distance between simultaneously made groups of impressions in the transmitter, changing the connections of the impulse generator with the operating circuits of the selector mechanisms, thus operating a plurality of :co-operaiting type selecting means in the printing device:

8. In the receiving arrangement of a printing telegraph system according to claim 3, a translating and printing arrangement, comprising n impulse made in the receiving station, means to drive each of the impresgenerator, operated by the record said record at ing an impulse generator low speed, a distributor and means to drive said distributor'with a speed which is in a certain fixed relation to the speed with which the record is driven, means toarrest said distributor and to hold it in said arresting means being operative after delivery of the last impulse associated with one character, while release of said distributor is efiected together with the sending of the first impulse for each character.

9. In the receiving arrangement of a printing telegraph system according to claim 3, a translating and printing arrangement comprisactuated by the sound record made in the receiving station, an impulse distributor, a type selecting mechanism and a type carrier, the latter'being adapted to be moved in two directions to select the desired type and to bring it into operative printing position, the type selecting mechanism comprising two different electromagnetically operated means for'imparting the two kinds of motion, each containing an actuating magnet, energizing circuits for said magnets connected with the distributor, a release magnet holding said type carrier in the position to which it has been moved and a local impulse circuit, controlled by said distributor for operating the release magnet and for restoring the mechanisms to their original position shortly before the record has been advanced for a distance corresponding to that existing between successively made impressions in the transmitter.

10. 'In the receiving arrangement of a printing telegraph according to claim 3, a translat- .ing and printing arrangement comprising an impulse generator, operated by the record made in the receiving station, means to at low speed, a distributor, and means to drive drive said record said distributor with a speed which is in a fixed speed relation to the speed at which the record is driven, means to arrest said distributor and to'hold it in its arrested position, said means operation for released by a start magnet,

being controlled and type selecting mechanisms and atype carrier, electromagnets operating the aforesaid mechanisms, operative circuits for said electromagnets controlled by the distributor, the start magnet being included in the circuit of the magnet which is operating the type carrier first during the eachtype to be selected, and releasing the distributor with the first impulse delivered to the type selecting mechanisms for each type, the said distributor being thus kept inpermanent correct space relation with respect to the various groups of impulses appearing on the record.

11. In the transmitting arrangement of a printing telegraph system according to claim 2, impression members consisting of type bars, with impression producing slugs arranged in several lines, two independent tapes for receiving the impressions, the said tapes being provided with independent means for feeding them past the printing position, when an impression is made, thus aligning the impressions made on different tapes at different distances.

12. In the transmitting arrangement of a printing telegraph according to claim 4, a sound recording surface consisting of a record disc, into Y which impressions are 'rnade directly by a matrix on impression members and means for simultaneously shifting and rotating said disc through a given angle after each impression.

, EUGEN REISZ.

its arrested position, 

